I hear about this straightness problem all the time with wood arrows, the only time that I got some snaky shafts was when I bought a bunch off of 'Ecrap', they looked like an arrow makers reject pile, I call them 'shoot aways' after they are straightened. I have never once had any penetration issues with wood with my family and friends. I have lost count of how many deer that I have helped drag out that were shot with bows 45 or less, wood arrows and two blade Bear and Zwicky heads. I like Wapiti cedars and Surewood Doug firs, Wapiti makes doug firs as well. If you want to make those guys hate you, be sure to ask for the straight ones when you order. I have gotten two shafts that would not straighten and stay straight from Wapiti or its predecessor Rogue River, that is two out of about 1000 shafts, maybe more. It is rare that they need much serious straightening, but I check them anyway. I have seen cases with cheap mill run light kids weight cedars that had snaky problems, but not at the 40 pound plus spines with higher grade and hand selected shafts.